improve training and model data

NN/models/transformer_model.py

@@ -339,12 +339,64 @@ class TransformerModel:
         
         # Ensure X_features has the right shape
         if X_features is None:
-            # Create dummy features with zeros
-            X_features = np.zeros((X_ts.shape[0], self.feature_input_shape))
+            # Extract features from time series data if no external features provided
+            X_features = self._extract_features_from_timeseries(X_ts)
         elif len(X_features.shape) == 1:
             # Single sample, add batch dimension
             X_features = np.expand_dims(X_features, axis=0)
         
+    def _extract_features_from_timeseries(self, X_ts: np.ndarray) -> np.ndarray:
+        """Extract meaningful features from time series data instead of using dummy zeros"""
+        try:
+            batch_size = X_ts.shape[0]
+            features = []
+            
+            for i in range(batch_size):
+                sample = X_ts[i]  # Shape: (timesteps, features)
+                
+                # Extract statistical features from each feature dimension
+                sample_features = []
+                
+                for feature_idx in range(sample.shape[1]):
+                    feature_data = sample[:, feature_idx]
+                    
+                    # Basic statistical features
+                    sample_features.extend([
+                        np.mean(feature_data),      # Mean
+                        np.std(feature_data),       # Standard deviation
+                        np.min(feature_data),       # Minimum
+                        np.max(feature_data),       # Maximum
+                        np.percentile(feature_data, 25),  # 25th percentile
+                        np.percentile(feature_data, 75),  # 75th percentile
+                    ])
+                    
+                    # Trend features
+                    if len(feature_data) > 1:
+                        # Linear trend (slope)
+                        x = np.arange(len(feature_data))
+                        slope = np.polyfit(x, feature_data, 1)[0]
+                        sample_features.append(slope)
+                        
+                        # Rate of change
+                        rate_of_change = (feature_data[-1] - feature_data[0]) / feature_data[0] if feature_data[0] != 0 else 0
+                        sample_features.append(rate_of_change)
+                    else:
+                        sample_features.extend([0.0, 0.0])
+                
+                # Pad or truncate to expected feature size
+                while len(sample_features) < self.feature_input_shape:
+                    sample_features.append(0.0)
+                sample_features = sample_features[:self.feature_input_shape]
+                
+                features.append(sample_features)
+            
+            return np.array(features, dtype=np.float32)
+            
+        except Exception as e:
+            logger.error(f"Error extracting features from time series: {e}")
+            # Fallback to zeros if extraction fails
+            return np.zeros((X_ts.shape[0], self.feature_input_shape), dtype=np.float32)
+
         # Get predictions
         y_proba = self.model.predict([X_ts, X_features])